CVE-2018-20533

Publication date 28 December 2018

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

There is a NULL pointer dereference at ext/testcase.c (function testcase_str2dep_complex) in libsolvext.a in libsolv through 0.7.2 that will cause a denial of service.

From the Ubuntu Security Team

It was discovered that libsolv incorrectly handled certain malformed input. An attacker could use this issue to cause libsolv to crash, resulting in a denial of service.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
libsolv	23.04 lunar	Fixed 0.6.5-2ubuntu1
	22.10 kinetic	Fixed 0.6.5-2ubuntu1
	22.04 LTS jammy	Fixed 0.6.5-2ubuntu1
	21.10 impish	Fixed 0.6.5-2ubuntu1
	21.04 hirsute	Fixed 0.6.5-2ubuntu1
	20.10 groovy	Fixed 0.6.5-2ubuntu1
	20.04 LTS focal	Fixed 0.6.5-2ubuntu1
	19.10 eoan	Fixed 0.6.5-2ubuntu1
	19.04 disco	Fixed 0.6.5-2ubuntu1
	18.10 cosmic	Fixed 0.6.35-2ubuntu0.18.10.1
	18.04 LTS bionic	Fixed 0.6.30-1ubuntu0.1~esm1 Ubuntu Pro
	16.04 LTS xenial	Fixed 0.6.11-1.1ubuntu0.1~esm1 Ubuntu Pro
	14.04 LTS trusty	Not in release

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
libsolv	Upstream: 4830af9

Severity score breakdown

Parameter	Value
Base score	6.5 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H